Town of Chino Valley. Survey Control Network Report. mgfneerhg mc N. Willow Creek Road Prescott AZ
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1 Town of Chino Valley Survey Control Network Report mgfneerhg mc N. Willow Creek Road Prescott AZ Page 1 of 70
2 Table of Contents Town of Chino Valley Survey Datum Outline A short outline of how the data for the Town of Chino Valley and it s GPS system has been developed. Converting between NAD 1983 Survey Data and Chino Valley Survey Datum (CVSD) A description of the steps to take in order to convert NAD83 data (state plane grid) to Chino Valley Survey Datum (on the ground). Survey Monument Record Details This section has the following data for each of the 10 Town Reference Point Monument Records: 1. Monument Field Visit Information 2. Corner Tie and Location Sketch 3. Satellite Obstruction Chart 4. Site photographs Town of Chino Valley Survey Datum Conversion Spreadsheet This section consists of a spreadsheet that lists all of the coordinates for each of the Control Points. Listed are NAD83 epoch 2002 Latitude/ Longitude, State Plane Grid (Arizona Central zone) coordinates international feet, and CVSD coordinates (Local Datum at Ground values). Control Monument Location Map This is a vicinity map showing the approximate locations of the Town s control points scattered throughout the Town and surrounding area. Page 2 of 70
3 Town of Chino Valley SURVEY DATUM NARRATIVE Page 3 of 70
4 TOWN OF CHINO VALLEY SURVEY DATUM NARRATIVE A static GPS network survey was performed in April of 2007 of twelve reference points in the Chino Valley area. Ten of these points are generally surrounding Chino Valley, one point is located to the northwest of the Town, and one point is located to the southeast of the Town. The GPS static network utilized three nearby CORS stations for base control. All CORS stations used have been established utilizing the NAD83 (2002) horizontal control and NAVD88 vertical control. The static GPS network was performed with Trimble GPS survey equipment and adjusted using Trimble Geomatics least squares adjustment routines with 99% confidence limits. NAD83 geodetic coordinates and State Plane (AZ Central zone 0202) were derived. Three existing NGS monuments have been included in this network and have been assigned coordinate values for the Chino Valley Survey Datum. These NGS monuments are Prescott North Base Reset (PID ET0892), COTT (PID ET0893), and Prescott South Base (PID ET1887). State Plane Coordinates established for those points herein differ from the previously established NGS State Plane Coordinates. An average elevation of the Town was derived from modeling the USGS Digital Elevation Models (DEM s) within Town limits. An average elevation of 4743 above MSL (NAVD88) was calculated using this methodology. A Town centroid was calculated by creating a closed polyline of the town boundary, and utilizing AutoCad 2002 centroid function to derive the state plane coordinates of said centroid. A combined scale factor was calculated based on the average Town elevation (sea level scale factor) and the centroid location (mapping projection scale factor) and is utilized in the calculations herein. It is the desire of Town officials to use this coordinate system in the Town of Chino Valley for future mapping projects. The Town has adopted a requirement that all future development projects shall be tied into this system. This system is not intended to replace the Public Land Survey system. It is intended to supplement it and allow for the easy conversion of data into and out of the Town s Geographic Information System (GIS). The specific requirements for survey ties for new development projects are available on the Development home page on the Town s web site. Page 4 of 70
5 Converting between NAD 1983 Survey Data and Chino Valley Survey Datum (CVSD) Page 5 of 70
6 TOWN OF CHINO VALLEY SURVEY DATUM CONVERSION METHODS Coordinate Units: International Feet (ift) Distance Units: International Feet (ift) Ellipsoid Height Units: International Feet (ift) Vertical Datum: NAVD 88 Otrhometric Height Units: International Feet (ift) State Plane: Coordinate System: US State Plane 1983 Datum: NAD 83 (2002) Zone: Arizona Central 0202 Geoid Model: GEOID03 (Conus) To convert from State Plane (grid NAD 83 epoch 2002) coordinates to Town of Chino Valley coordinates (ground): Northing: (State Plane x ) 1,000,000 Easting: (State Plane x ) 400,000 Example: Given State Plane coordinates: N State Plane = 1,346, ift E State Plane = 549, ift Town of Chino Valley ground coordinates are derived as follows: N CVSD = (1,346, x ) 1,000,000 = 346, ift E CVSD = (549, x ) 400,000 = 149, ift Page 6 of 70
7 To convert from Town of Chino Valley Survey Datum (ground) coordinates to State Plane (grid NAD 83 epoch 2002) coordinates: Northing: (CVSD + 1,000,000) x Easting: (CVSD + 400,000) x Example: CVSD coordinates: N CVSD = 412, ift E CVSD = 134, ift State Plane (grid) coordinates are derived as follows: N State Plane = (412, ,000,000) x = 1,412, ift E State Plane = (134, ,000) x = 534, ift Town Centroid (NAD 83): N lat W long. Town Average Elevation: 4,743 feet above MSL (NAVD 88) Page 7 of 70
8 SURVEY MONUMENT RECORD DETAILS Page 8 of 70
9 Page 9 of 70
10 Page 10 of 70
11 Page 11 of 70
12 Page 12 of 70
13 North South Page 13 of 70
14 East West Page 14 of 70
15 Page 15 of 70
16 Page 16 of 70
17 Page 17 of 70
18 Page 18 of 70
19 North South Page 19 of 70
20 East West Page 20 of 70
21 Page 21 of 70
22 Page 22 of 70
23 Page 23 of 70
24 Page 24 of 70
25 North South Page 25 of 70
26 Page 26 of 70
27 Page 27 of 70
28 Page 28 of 70
29 Page 29 of 70
30 North South Page 30 of 70
31 East West Page 31 of 70
32 Page 32 of 70
33 Page 33 of 70
34 Page 34 of 70
35 Page 35 of 70
36 North South Page 36 of 70
37 East West Page 37 of 70
38 Page 38 of 70
39 Page 39 of 70
40 Page 40 of 70
41 Page 41 of 70
42 North South Page 42 of 70
43 East West Page 43 of 70
44 Page 44 of 70
45 Page 45 of 70
46 Page 46 of 70
47 Page 47 of 70
48 North South Page 48 of 70
49 East West Page 49 of 70
50 Page 50 of 70
51 Page 51 of 70
52 Page 52 of 70
53 Page 53 of 70
54 North South Page 54 of 70
55 East West Page 55 of 70
56 Page 56 of 70
57 Page 57 of 70
58 Page 58 of 70
59 Page 59 of 70
60 North South Page 60 of 70
61 East West Page 61 of 70
62 Page 62 of 70
63 Page 63 of 70
64 Page 64 of 70
65 Page 65 of 70
66 North South Page 66 of 70
67 East West Page 67 of 70
68 TOWN OF CHINO VALLEY DATUM CONVERSION SPREADSHEET Page 68 of 70
69 State Plane Coordinates (Meters) NAD83 (Conus) AZ Central Zone (epoch 2002) NAVD88 Name Latitude Longitude Height Northing Easting Elevation ' "N ' "W ' "N ' "W ' "N ' "W ' "N ' "W ' "N ' "W ' "N ' "W ' "N ' "W ' "N ' "W ' "N ' "W COTT 34 47' "N ' "W Prescott North Base Reset 34 50' "N ' "W Prescott South Base 34 41' "N ' "W AZAH 33 46' "N ' "W AZPE 33 34' "N ' "W FST ' "N ' "W State Plane Coordinates AZ Central, epoch 2002 (NAD ) to Chino Valley Survey Datum (CVSD) State Plane Coordinates (International Feet) Town of Chino Valley Survey Datum AZ Central Zone (epoch 2002) NAVD88 Name Northing Easting Elevation Northing Easting Elevation Centroid COTT Prescott North Base Reset Prescott South Base Page 69 of 70
70 CONTROL MONUMENT LOCATION MAP Page 70 of 70
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